Fluid operated undercutter

Details Fluid operated undercutter Fluid operated undercutter

E - Fixed Constructions

21

B

255/13

E21B 4/06 (2006.01) E21B 4/14 (2006.01) E21B 4/16 (2006.01) E21B 4/18 (2006.01) E21B 4/20 (2006.01) E21B 10/32 (2006.01)

Patent

CA 1085376

A B S T R A C T An undercutter for undercutting the wall of a substantially parallel sided hole and comprising a substantially tubular body adapted to pass into said hole, means on the body for setting the length of said body contained in the hole and a fluid-operated cutting head on the body and adapted to be rotated within the hole so as to form an undercut portion therein.

281510

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